.fl{  float: left}
.fr{  float: right}
.ma{  margin: auto }
.m0a{margin:0 auto}
.ofh{overflow: hidden}
.clear{  clear: both;  height: 0;  overflow: hidden}
.tac{  text-align: center;}
.dib{  display: inline-block;}
.dn{  display: none;}
.db{  display: block;}
/*宽高*/
.wa{  width: auto;}
.ha{  height: auto;}
/*定位*/
.poa{  position: absolute}
.por{  position: relative}
.pof{  position: fixed}
/*cursor:pointer*/
.cp{cursor:pointer}
